In any case, I'm actually surprised that JR is actually cheaper than OD by a wide margin for the PG formula and only slightly more expensive than OD for SGs.
Interesting. Of course the problem is, once JR gets too a decent level it turns most PG's into SG's and their salary starts jumping exponentially as it did in your first example.
I played around with my $57K PG. He's currently 16 DR and 9 JR. I just swapped those 2 numbers so 16 JR and 9 DR and he was suddenly estimated as a 127K SG. And the crazy part is that the lower salaried player is better for LI offense anyways.
So if you ask me, JR is still way too expensive for what you get. Plus it doesn't even guarantee that your player will make 3 pointers at a decent level. The top 3 point shooter in Canada D1 is only at 32% and he's an NT player with a salary well over 200K. The one team that consistently runs motion offense with his 3 high quality perimeter players has them shooting 3's at 28, 27 and 26%.
The switch to the SG formula is a killer salarywise, for sure, and the benefit is definitely questionable unless you're running an outside offense and even then, as you point out, against the common LI guards with massive OD and passing, it's hard to shoot effectively beyond the arc. On the bright side, at least JR is slow to train... oh. ;)
Anyway, it's definitely unfortunate that the "throwaway" skill for the LI guard is one that is so expensive for an outside build - if driving and JR had their values switched for salary calculation, it would definitely be an interesting shift in the environment.